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Message-ID: <a2fd9901-d8fc-3ba7-4422-2616bbf23220@linux.ibm.com>
Date: Tue, 24 Nov 2020 01:41:13 +1100
From: Andrew Donnellan <ajd@...ux.ibm.com>
To: oss-security@...ts.openwall.com,
linuxppc-dev <linuxppc-dev@...ts.ozlabs.org>
Subject: Re: Linux kernel: powerpc: RTAS calls can be used to compromise
kernel integrity
On 9/10/20 12:20 pm, Andrew Donnellan wrote:
> The Linux kernel for powerpc has an issue with the Run-Time Abstraction
> Services (RTAS) interface, allowing root (or CAP_SYS_ADMIN users) in a
> VM to overwrite some parts of memory, including kernel memory.
>
> This issue impacts guests running on top of PowerVM or KVM hypervisors
> (pseries platform), and does *not* impact bare-metal machines (powernv
> platform).
CVE-2020-27777 has been assigned.
--
Andrew Donnellan OzLabs, ADL Canberra
ajd@...ux.ibm.com IBM Australia Limited
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